package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

@Service
@Transactional//开启事务
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    //查询
    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }

    @Override
    public void save(Category category) {
        //1.补齐参数
        category.setId(IdUtil.getSnowflake(1, 1).nextId());
  /*      category.setCreateTime(new Date());
        category.setUpdateTime(new Date());
        category.setCreateUser(1L);
        category.setUpdateUser(1L);*/
        categoryMapper.save(category);
    }

    @Override
    public void update(Category category) {
        //设置修改人和时间
       /* category.setUpdateUser(1L);
        category.setUpdateTime(new Date());*/

        categoryMapper.update(category);
    }

    @Override
    public ResultInfo delete(Long id) {
        Integer dishnum = categoryMapper.countDishByCategoryId(id);
        if (dishnum>0){
            throw new CustomException("此分类下存在菜品，不允许删除");
        }
        Integer setmealnum = categoryMapper.countSetmealByCategoryId(id);
        if (setmealnum>0){
            throw new CustomException("次分类下存在套餐，不允许删除");
        }
        categoryMapper.delete(id);
        return ResultInfo.success(null);
    }

    @Override
    public List<Category> findByType(Integer type) {
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Category::getType, type);
        return categoryMapper.selectList(wrapper);
    }
}
